Rewrite scoped_ptr<T>(NULL) to use the default ctor in chrome/.

chrome/browser/chromeos/cros/cros_library.cc

Index: chrome/browser/chromeos/cros/cros_library.cc
diff --git a/chrome/browser/chromeos/cros/cros_library.cc b/chrome/browser/chromeos/cros/cros_library.cc
index f310371cedd868e7985b31503c7930072c78c25e..abe50957041bef57d8efb4124ac8e8994a50c10f 100644
--- a/chrome/browser/chromeos/cros/cros_library.cc
+++ b/chrome/browser/chromeos/cros/cros_library.cc
@@ -21,10 +21,7 @@ namespace chromeos {
 
 static CrosLibrary* g_cros_library = NULL;
 
-CrosLibrary::CrosLibrary(bool use_stub)
-    : use_stub_impl_(use_stub),
-      test_api_(NULL) {
-}
+CrosLibrary::CrosLibrary(bool use_stub) : use_stub_impl_(use_stub) {}
 
 CrosLibrary::~CrosLibrary() {
 }